{
 "cells": [
  {
   "cell_type": "markdown",
   "id": "b425fb43",
   "metadata": {},
   "source": [
    "# 本周知识点"
   ]
  },
  {
   "cell_type": "markdown",
   "id": "a9d7c63e",
   "metadata": {},
   "source": [
    "> 1. while循环\n",
    "> 2. 购物车的练习"
   ]
  },
  {
   "cell_type": "code",
   "execution_count": null,
   "id": "5c46d6c9",
   "metadata": {},
   "outputs": [],
   "source": [
    "count = 0\n",
    "while True:\n",
    "    print(\"你是风儿我是沙，缠缠绵绵到天涯...\",count)\n",
    "    count +=1"
   ]
  },
  {
   "cell_type": "code",
   "execution_count": 6,
   "id": "73c84494",
   "metadata": {
    "scrolled": true
   },
   "outputs": [
    {
     "name": "stdout",
     "output_type": "stream",
     "text": [
      "你是风儿我是沙，缠缠绵绵到天涯... 0\n",
      "你是风儿我是沙，缠缠绵绵到天涯... 1\n",
      "你是风儿我是沙，缠缠绵绵到天涯... 2\n",
      "你是风儿我是沙，缠缠绵绵到天涯... 3\n",
      "你是风儿我是沙，缠缠绵绵到天涯... 4\n",
      "你是风儿我是沙，缠缠绵绵到天涯... 5\n",
      "你是风儿我是沙，缠缠绵绵到天涯... 6\n",
      "你是风儿我是沙，缠缠绵绵到天涯... 7\n",
      "你是风儿我是沙，缠缠绵绵到天涯... 8\n",
      "你是风儿我是沙，缠缠绵绵到天涯... 9\n"
     ]
    }
   ],
   "source": [
    "# while true 可以实现for+range的方法\n",
    "#while true 一般用于不确定的循环次数或者无限次循环操作\n",
    "count = 0\n",
    "while True:\n",
    "    print(\"你是风儿我是沙，缠缠绵绵到天涯...\",count)\n",
    "    count +=1\n",
    "    if count == 10:\n",
    "        break"
   ]
  },
  {
   "cell_type": "code",
   "execution_count": 20,
   "id": "a9cd41f7",
   "metadata": {},
   "outputs": [
    {
     "name": "stdout",
     "output_type": "stream",
     "text": [
      "hide_card:33\n"
     ]
    }
   ],
   "source": [
    "# 猜数字小游戏： 0<n<100，5次机会猜数字，每次猜完出题人提示你猜的有点大/有点小\n",
    "\n",
    "hide_card = int(input(\"hide_card:\"))\n",
    "count = 0"
   ]
  },
  {
   "cell_type": "code",
   "execution_count": 22,
   "id": "4eeec74c",
   "metadata": {},
   "outputs": [
    {
     "name": "stdout",
     "output_type": "stream",
     "text": [
      "hide_card········\n",
      "游戏开始了\n",
      "guess_digit:33\n",
      "yes,you got it.\n"
     ]
    }
   ],
   "source": [
    "import getpass\n",
    "hide_card = int(getpass.getpass(\"hide_card\"))\n",
    "count = 0\n",
    "# print(hide_card)\n",
    "if hide_card <100 and hide_card>0:\n",
    "    print(\"游戏开始了\")\n",
    "    while True:\n",
    "        if count <5:\n",
    "            guess_digit = int(input(\"guess_digit:\")) # 玩游戏的人\n",
    "            if guess_digit == hide_card:\n",
    "                print(\"yes,you got it.\")\n",
    "                break\n",
    "            elif guess_digit > hide_card:\n",
    "                print(\"往小了想想...\")\n",
    "            else:\n",
    "                print(\"往大了猜\")\n",
    "            count = count+1\n",
    "        else:\n",
    "            print(\"猜这么多次都不对，你个笨蛋！\")\n",
    "            print(\"正确答案是：%s\"%hide_card)\n",
    "            break\n",
    "else:\n",
    "    print(\"请输入数字在0-99之间。不要耍赖！\")"
   ]
  },
  {
   "cell_type": "markdown",
   "id": "0f106dd4",
   "metadata": {},
   "source": [
    "## 课后练习\n",
    "### 要求：\n",
    "\n",
    ">1. 运行程序后，让用户输入支付宝余额，然后打印我们的商品列表给用户。\n",
    ">2. 让用户输入商品编号进行商品的购买。\n",
    ">3. 用户选择商品后，检查用户的余额是否够，若够则直接扣款，不够则提醒用户。\n",
    ">4. 用户可以随时退出购买，推出时打印用户已购买的商品和支付宝余额。"
   ]
  },
  {
   "cell_type": "code",
   "execution_count": 49,
   "id": "ba4b125c",
   "metadata": {},
   "outputs": [
    {
     "name": "stdout",
     "output_type": "stream",
     "text": [
      "请输入余额：100\n",
      "-----蜜雪冰城列表-----\n",
      "0 蜜桃四季春 6元\n",
      "1 柠檬茶 4元\n",
      "2 草莓奶盖 10元\n",
      "3 杨枝甘露 12元\n",
      "请输入商品编号：7\n",
      "您输入的商品不存在或者您输入的内容有误！\n",
      "-----蜜雪冰城列表-----\n",
      "0 蜜桃四季春 6元\n",
      "1 柠檬茶 4元\n",
      "2 草莓奶盖 10元\n",
      "3 杨枝甘露 12元\n",
      "请输入商品编号：2\n",
      "购买成功，请等待制作...您的余额还有：90元\n",
      "-----蜜雪冰城列表-----\n",
      "0 蜜桃四季春 6元\n",
      "1 柠檬茶 4元\n",
      "2 草莓奶盖 10元\n",
      "3 杨枝甘露 12元\n",
      "请输入商品编号：Q\n",
      "感谢您的购买，欢迎下次光临。\n",
      "您的购物车： [['草莓奶盖', 10]]\n",
      "您的余额还有： 90\n"
     ]
    }
   ],
   "source": [
    "# 1 运行程序后，让用户输入支付宝余额，然后打印我们的商品列表给用户\n",
    "good_list = [\n",
    "    [\"蜜桃四季春\",6],\n",
    "    [\"柠檬茶\",4],\n",
    "    [\"草莓奶盖\",10],\n",
    "    [\"杨枝甘露\",12],\n",
    "]\n",
    "# 数据存放，列表的增加（append）\n",
    "shopping_list = []\n",
    "AliPay = int(input(\"请输入余额：\"))\n",
    "\n",
    "while True:\n",
    "    print(\"-----蜜雪冰城列表-----\")\n",
    "    for i in range(4):\n",
    "        print(i,good_list[i][0],str(good_list[i][1])+\"元\")\n",
    "\n",
    "    # print(good_list[0][0],good_list[0][1])\n",
    "    # print(good_list[1][0],good_list[1][1])\n",
    "    # print(good_list[2][0],good_list[2][1])\n",
    "    # print(good_list[3][0],good_list[3][1])\n",
    "\n",
    "    # 2 让用户输入商品编号，进行商品的购买\n",
    "    user_choice = input(\"请输入商品编号：\")\n",
    "\n",
    "    # 3 用户选择商品后，检查用户的余额是否够，若够则直接扣款，不够则提醒用户。\n",
    "    # 3.1用户输入商品序号（数值）\n",
    "    if user_choice.isdigit() and int(user_choice)<len(good_list) and int(user_choice)>=0:\n",
    "        user_choice = int(user_choice)\n",
    "        if AliPay > good_list[user_choice][1]:\n",
    "            # 余额足够\n",
    "            AliPay = AliPay - good_list[user_choice][1] # 更新用户余额\n",
    "            shopping_list.append(good_list[user_choice])\n",
    "            print(\"购买成功，请等待制作...您的余额还有：%s元\"%(AliPay))\n",
    "        else:\n",
    "            # 余额不够\n",
    "            print(\"你连\"+str(good_list[user_choice][1])+\"元都没有，还有脸喝蜜雪冰城！！哼！\")\n",
    "    # 3.2 用户输入其他\n",
    "    elif user_choice == \"Q\":\n",
    "        print(\"感谢您的购买，欢迎下次光临。\")\n",
    "        print(\"您的购物车：\",shopping_list)\n",
    "        print(\"您的余额还有：\",AliPay)\n",
    "        break\n",
    "    else:\n",
    "        print(\"您输入的商品不存在或者您输入的内容有误！\")"
   ]
  }
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